juvenile hormone
C2/TechnicalTechnical/Scientific
Definition
Meaning
An insect hormone that maintains larval characteristics and prevents metamorphosis into the adult stage.
In broader usage, can refer to any substance or factor that delays maturation or the expression of adult characteristics, sometimes used metaphorically.
Linguistics
Semantic Notes
Always used as a compound noun. The primary meaning is strictly entomological/biological. Metaphorical use is rare and typically found in specialized academic discourse (e.g., sociology).
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling. Both varieties use the same compound noun.
Connotations
Purely technical/scientific in both varieties. No colloquial or figurative connotations.
Frequency
Equally low-frequency and confined to biological/entomological contexts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
The [gland] secretes juvenile hormone.Juvenile hormone [prevents/regulates/delays] [process].Application of juvenile hormone [causes effect].Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used extensively in entomology, developmental biology, and pest control research.
Everyday
Virtually never used.
Technical
Core term in insect physiology and insect growth regulator (IGR) technology.
Examples
By Part of Speech
verb
British English
- The treatment aims to juvenilise the insect's development.
- The larvae were juvenilised by the application.
American English
- The treatment aims to juvenilize the insect's development.
- The larvae were juvenilized by the application.
adjective
British English
- The juvenile-hormone analogue was effective.
- They observed a juvenile hormone-like effect.
American English
- The juvenile-hormone analog was effective.
- They observed a juvenile hormone-like effect.
Examples
By CEFR Level
- Juvenile hormone is important for understanding insect life cycles.
- Some pesticides work by mimicking juvenile hormone.
- The corpora allata is the gland responsible for the biosynthesis of juvenile hormone.
- Application of a juvenile hormone analogue disrupts normal metamorphosis, preventing the emergence of reproductive adults.
Learning
Memory Aids
Mnemonic
Think of a 'juvenile' (young person) who doesn't want to grow up. Juvenile hormone keeps an insect 'young' (in a larval state) and stops it from becoming an adult.
Conceptual Metaphor
A MORATORIUM ON MATURATION (something that actively delays or suspends the process of becoming an adult form).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'juvenile' as 'ювенальный' (which relates to juvenile justice). The correct equivalent is 'ювенильный'.
- Avoid the direct calque 'молодежный гормон'. The established term is 'ювенильный гормон'.
Common Mistakes
- Using it as an adjective (e.g., 'juvenile-hormone effect' is better hyphenated as 'juvenile hormone effect' or rephrased).
- Confusing it with other insect hormones like 'ecdysone'.
- Attempting to use it in non-scientific contexts.
Practice
Quiz
What is the primary function of juvenile hormone in insects?
FAQ
Frequently Asked Questions
Yes, it is a term specific to insect physiology. Similar regulatory substances in other animals have different names.
No, not in a technical sense. It is occasionally used as a metaphor in social sciences to describe factors delaying social maturation, but this is not standard biological usage.
The standard abbreviation in scientific literature is 'JH' (e.g., JH III is the most common form in many insects).
Synthetic juvenile hormone analogues (Insect Growth Regulators, or IGRs) are used as pesticides. They prevent pest insects from maturing into reproducing adults, breaking their life cycle.